Drying-cylinder.



0. W. DODGE.

DRYING CYLINDER. APPLICATION FILED OCT-2.1912. RENEWED MAR. 8.1915

Patented Dec. 7, 1915.

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O W. DODGE.

DRY|NG CYLSNDER. APPLICATION men OCT. 2 1912. RENEWED MAR. 8. 1915.

18,224 Y Patented Dec. 7, 1915.

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DRYING-CYLINDER.

Application filed October 2, 1912, Serial No. 723,629. Renewed March 8, 1915.

To all whom. it may concern:

Be it known that I, OTIS W. Dome, of Spokane, in the county of Spokane and State of Washington, have invented certain new and useful Improvements in Drying-Cylinders; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings. which form part of this specification.

This invention is an improved apparatus for removing moisture such as water of condensation from the interior of rotary cylinders, and is particularly adapted for use in connection with the drying cylinders of paper making machines. laundry machines, and the like, in which material is dried by passing it over steam heated cylinders; but is useful wherever rotary cylinders are to be heated by steam. In particular the invention is an improvement upon the apparatus shown in my Patent No. 977.376 dated November 29, 1910.

The objects of the present invention are to insure the exclusion of air from such cylinders, thereby obtaining a more nearly uniform heating of the cylinder: to provide for the introduction of steam into the cylinder at a point remote from the steam inlet connection to the cylinder and from the water discharging point; to provide novel means for securing the scoops to permit contraction and expansion thereof; and to provide novel means for securing the apparatus within cylinders already in use.

1 will explain the several features of the invention and the details of construction of the apparatus with reference to the accompanying drawings which illustrate an apparatus embodying the invention applied to a drying cylinder of the ordinary type; and will summarize in the claims the features and combinations of parts for which protection is desired.

In said drawings-Figure 1 is a longitudinal sectional elevation of the drying cylinder showing the steam supply connections and the moisture removing apparatus in ele vation. parts of the latter being broken away for the purpose of clearness. Fig. 2 is an enlarged transverse section on line Fig. 1. Fig. 3 is an enlarged section on line 3-3, Fig. 1. Fig. 4 is an enlarged detail section. Figs. 5 and 6 are detail views of the scoop fastening studs. Fig. 7 is an enlarged section on line 77, Fig. 1. Fig. 8 is a detail Specification of Letters Patent.

Patented Dec. 7, 1915.

Serial No. 12,916.

section. Fig. 9 is an enlarged detail plan view of one of the scoops and its fastenings.

The drying cylinder 1 may be of any suitable construction and is shown as provided with heads 1, 1 which are provided with trunnions by which the cylinder may he rotatably mounted in suitable bearings (not shown). The trunnion 1 of the head 1 is hollow and through this hollow trunnion steam is admitted into the cylinder and the water exhausted as hereinafter explained.

Attached to the inner side of the head 1 is a preferably circular casting 2 having a central chamber 2 and an axial opening 2" communicating with the chamber andthe bore of the trunnion 1; and on the inner face of this casting in axial alincment with the opening 2 is a smaller opening in which is fitted the inner end of a drain pipe 3 which extends outwardly through the bore of the trunnion 1 and is connected to a drain pipe, hereinafter referred to.

In the inner face of the block 2 and in axial alinement with the drain pipe 3, is an enlarged opening which is preferably internally threaded and into which is screwed one end of a larger drain pipe 3 which extends longitudinally in and axially of the cylinder 1 preferably to a point closely adjacent the head 1; and the inner end of this pipe 3 is closed by a plug 3*. The closed end of said pipe 3 is preferabl y supported in position within the cylinder by means of a spider consisting of a hub or collar portion 1 having radiating arms 1 which are provided with laterally flanged extremities 1 which flanged portions are engaged by bars or spoke members 1 secured to the spokes 4 by bolts 1 and the outer ends of the members 4 are attached to the wall of the cylinder 1 or to an integral part of the cylinder by bolts 4 as indicated in the drawings. The closed end of pipe 3 passes through the hub 4.

In the construction shown the cylinder 1 has an annular flange 1 at each end to which the heads 1. 1 are bolted and the spoke arms 1 in this construction are directly bolted to the inner side of this flange 1 but may be secured to the wall of the cylinder in any suitable manner in order to fasten the spider to the cylinder independently of the head 1. And this construction affords a ready means of attaching and centering the inner end of the pipe 3 in the cylinder. By providing the directly to the wall of the cylinder;

spiders with the spoke sections .4 such spiders can be used in cylinders of different diameters: and such spiders can be introduced into the cylinders of machines already in use and can be securely fastened thereto before the head is put in place. I

(onnected with the pipe 3 at suitable intervals apa'rt are convolutely bent pipes 3 which are preferably connected to the pipe 3 by means of yoke castings 3 attached to the inner ends of the pipes 33, these yokes being provided with annular collars 3* which engage the openings or holes in the pipe 3, see Fig. 7; and after the collar of a yoke has been inserted in the proper opening the yoke is clamped to the pipe 3 by means of U-shaped bolts 3 secured by nuts 3", see Fig. 2. This provides a very simple but durable means of detachably connecting the pipes 3 and 3.

The outer end of each pipe 3 is connected to a scoop member 3 each scoop has a Wide flaring mouth 3 at its front or receiving edge and has converging sides at the rear terminating in the contracted discharge portion 3 to which the end of the pipe 3 is connected, the construction being such that all the material which is taken up by the scoop or which enters the mouth 3 of the scoop is directed into the pipe 3 and by the latter ultimately delivered into the pipe 3. Preferably the scoops 3 are made of aluminurrf-and other non-corrodiblc metal which has a coefiicient of expansion different from that of the metal of the cylinder, and as the shell of the cylinder is subjected to varying heat influences I have found it undesirable in practice to bolt or rivet the scoops and I provide a simple and eflicient means for securing the scoops in position in the cylinder and at the same time permitting unequal expansion and contraction of the metal parts. This scoop fastening means comprises a rod 5 preferably of brass, which eX- tends across the row of scoops therein, adjacent the mouths thereof, the rod 5 being preferably seated in notches in the side walls 3 of the scoops adjacent the front edges thereof. The rod 5 is maintained in position by being passed through slotted openings 5 in stud bolts 5 which may be tapped into the wall of the cylinder at suitable points; and the rod 5 is clamped down in the notches of the side walls of the scoop by setting bolts 5 tapped through the upper ends of the stud bolts 5, see Figs. 5 and 6; said bolts 5" being provided with jam nuts 5 so that when properly adjusted they will not work loose. The rod 5 itself forms a lock to prevent the stud bolts 5 becoming casually unscrewed. Each scoop may be provided with upstanding studs or bridges 3" on its front edge (Figs. 1 and 9) which underlie the rod 5 and are engaged thereby and which prevent the mouth of the scoop buckling.

In practice I prefer to arrange a number of scoops 3 close together within the cylinder so that the series of scoops will extend substantially in line the entire length of the cylinder; and each scoop is connected by its convolutely bent pipe 3 to the drain pipe 3 so that the scoops will take up water of condensation and discharge same into the pipe 3 as the scoops rotate with the cylinder after the manner described in my patent aforesaid. ()ne of the side flanges of each scoop may be extended at front as shown at 3 Fig. S) so as to shield the adjacent stud and direct water into the scoop which might otherwise pass the stud.

As thus far described the improvements over my patent are in the means for mounting the pipe 3 within the cylinder; the means for connecting pipe 3 to the pipe 3; and in the means for holding the scoops 3 to the cylinder -wall.

Ordinarily steam is admitted d rectly intothe cylinder at the head 1 but I have found that this construction frequently results in the trapping of air in the cylinder, and in order to prevent trapping of air and insure a more nearly uniform heating of the cylinder and to obtain greater economy of steam, instead of admitting the steam into the cylinder at the head 1 I conduct the steam to a point adjacent head 1 through one or more pipes 6, two being shown, which pipes extend parallel with the pipe 3 and are connected at one end with the block 2, being screwed into suitable openings in said block so that the pipes communicate with the steam chamber 2. The pipes 6 may be supported adjacent the spider l by means of a yoke or bracket formed of two similar parts 6 provided with ears (5 on their meeting edges and which are adapted to surround the pipe 3 and be clamped thereto by means of bolts 6 transfiXing the opposed ear-s6 Each part 6 has an opening for the passage of a pipe 6 and such pipe may be fastened thereto by a set bolt 6", see Fig. 4.

The pipe 3 passes through a suitable stuffing box 10 on the trunnion and into a chamber 55*, in a casting 8, which chamber connects with a pipe 8 by which the water of condensation is conducted to any suitable point of discharge. The casting 8 has another chamber 8 to which steam is supplied by a pipe 8 from a boiler or other suitable generator. The chamber 8 communicates with the bore of the trunnion 1 through a sleeve 7 attached to casting 8 and passing through stulling box 10 so that the cylinder can rotate while the casting 8 is stationary. The drain pipe 3 extends axially through the sleeve 7 and the trunnion and it may be supported within the trunnion by a cylindric casting 9 having longitudinal passages 1 9" for the passage of steam around the bearing of the pipe 3?, see" Fig. 4.

be picked up'by the scoops 3 and directed to the pipes '3 and ultimately discharged thereby into the central pipe 3, fromwhlch the water will pass to the pipe 3; and

thence pass out through the trunnion 1.

What I claim is: e 1. In combination a drying cylinder, scooping means within the cylinder, a dram pipe connected with said scooping means, and a discharge pipe connected with said drain.

pipe and extending through one of the trunnions of the cylinder; with means for en plying steam to the cylinder through sa1d trunmon, and means for conducting steam from" said trunnion to the opposite end of the cylinder before discharging it thereinto.

2. In combination with a drying cylinder, scoopin means extending longitudinally of said cylinder and attached to the inner wall .thereof, a drain pipe whereby water is dis charged from the cylinder, and connections between the scooping means and the drain pipe; with means for admitting steam into the cylinder adjacent the discharge end of the drain pipe, and means for conducting steam from the steam inlet to the opposite end of the cylinder before discharging it therein.

3. In combination a drying cylinder, ahollow trunnion, means for admitting steam jlnto sa1d trunmon, a chambered member 1 within the cylinder communicating with said trunnion, a steam pipe connected with said member for conducting steam therefrom to the opposite end of the cylinder, and adrain pipe within the cylinder; a discharge pipe connected with said drain pipe and extendinto said trunnion, and a pipe connected ing through the said member; with scooping means in the cylinder, and pipes connecting said scooping means with the drain pipe.

fl. Incombination a drying cylinder having a hollow trunnion, and a chambered member within the cylinder connected to said trunnion, means for admitting steam with said member for conducting steam from the said chamber to the opposite end of the cylinder; with a drain pipe whereby water is discharged from the cylinder, a discharge pipe connected with said drain pipe and extending through the said member; scooping means in the cylinder, and convolutely bent pipes connecting said scooping means with the drain pipe in the cylinder.

5. In combination a cylinder having a hol-' low trunnion on one head,achambered block connected with said trunnion, inside the cyl-' inder, a steam pipe connected with the chamber in said block and extending withinthe series of scoops within and cylinder to the opposite end thereof, adrain scooping means within the cylinder, and

pipes connecting said scooping means with the drain pipe, substantially as described. firln'combmation a cylinder having a hollow trunnion on one head, a chambered block connected with said trunnion at the inner side of the cylinder, a steam pipe'connected w1th said block and extending in the cylinder to the opposite end thereof, a drain ipe connected w1th said block and exten lengthwise of the cylinder, and a discharge plpe connected with said drain pipe; with a extending longitudinally of the cylinder, and convolutely ent pipes connectlng said scoops with the drain pipe, substantially as described.

7 In combination a drying cylinder having a hollow trunnion, a chambered block within the cylinder connected to the said trunnion, a steam pipe connected with the chamber in said block, a drain pipe within the cylinder having one end fastened to said block and its other end closed; and means for supportin the closed end of the drain pipe within the cylinder; with scooping ing so means in the cylinder andpipes connecting the scooping means with the drain pipe.

8. In combination a drying cylinder having a hollow trunnion, a chambered block within the cylinder connected to the said trunnion, a steam pipe connected with the chamber in said block, a drain pipe parallel with the steam pipe within the cylinder and having one end fastened to said bloclrand its other end closed; a spider supporting the closed end of the drainpipe within the cyl-.

within the cylinder connected to the said trunnion, a steam pipe, connected with the chamber in said block, and a drain pipe parallel with the steam pipe within the cylinder and having one end fastened to said block and its other end closed, means supporting the closed end of the drain pipe within the cylinder, a yoke mounted on the drain pipe and supporting the steam pipe;

with scooping means in the cylinder and pipes connecting the scooping means with the drain pipe.

10. In combination with a drying cyllnder having a hollow trunnion, a chambered block within the cylinder connected to the said trunnion, asteam pipe connected with the chamberin said block,a drain pipe parallel with the steam pipe within the cylinder and having one end fastened to said block and its other end closed; means suplportlng the closed end of the drain pipe wit 1n the cylinder, a yoke mounted on the drain pipe and supporting the steam pipe thereon, a series of scoops in the cylinder extending longitudinally thereof, and convolutely bent pipes connecting the scoops with the drain pipe.

1.1. In combination a cylinder, a scoop therein, and a rod extending across the mouth of the scoop and fastening the latter in position against the Wall of the cylinder.

12. In combination a cylinder, a plurality of scoops therein, and a rod extending across the mouths of the scoops and securing them against the wall of the cylinder.

13. In combination a drying cylinder, a drain pipe therein, a scoop in the cylinder connected with the drain pipe, a rod extending across the mouth of the scoop to fasten same to the cylinder and slotted studs attached to the cylinder and engaged by said rod.

14. In combination a drying cylinder, a drain pipe therein, and a plurality of scoops in the cylinder connected with the drain pipe; with a rod extending across the mouths of the scoops and slotted studs intermediate the scoops engaging said rod whereby the.

mouths of the scoops are Wall of the cylinder.

15. In combination a drying cylinder,a drain pipe therein, a plurality of scoops each having an open mouth and side flanges, and tubes connecting said scoops with the drain pipe; with a rod extending across the mouths of the scoops and engaging the side flanges thereof, and means for securing said rod, to the wall of the cylinder and thereby causing it to clamp the scoops in position.

16. A scoop for the purpose described, having a wide open mouth, .side flanges, bridges at its mouth and a converging closed end; with a fastening rod extending across the mouth of the scoop and resting upon fastened to the the flanges and bridges thereof and means for fastening the rod to the cylinder; with a drain pipe in the cylinder and pipes connecting the scoop with the drain pipe.

17. In combination with a drylng cylinder, an axially disposed drain pipe arranged within the cylinder and extending substantially the length thereof, a series of scoops within and extending longitudinally of the cylinder, and bent pipes for conducting water from; the scoops into said drain pipe; with a longitudinally disposed ro'd overlying the scoops, and means for fastening said rod to the wall of'the cylinder to retain the scoops in position.

18. In combination a drying cylinder; with pipes for conducting steam from one end of the cylinder to the opposite end thereof, an axially disposed drain pipe arranged within the 'cylinder and extending substantially the length thereof, and dischargin at the steam inlet end of the-cylin ler; wit

a series of scoops within and extending lon- 19. In comblnation a drying ylinder, a

drain pipe arranged within the cylinder and discharging at one end thereof; scooping means within the cylinder; and pipes for conducting water from the scooping means into said drain pipe; with pipes for supplying steam to the cylinder at the end thereof at which the water is discharged, and means in the cylinder for conducting the steam from the steam supply end of the cylinder to the opposite end thereof before it is discharged into the cylinder.

20. In combination a drying cylinder, an axially disposed drain pipe arranged within the cylinder and extending substantially the length thereof, scooping means within and I extending longitudinally of the cylinder; and convolutely bent pipes for conducting water from the scooping means into said drain pipe; with means for supplying steam to the cylinder at the end thereof at which the water is discharged, and means in the cylinder for conducting the steam from the steam supply end of'the cylinder to the opposite end thereof before it is discharged into the cylinder.

21. In combination with a cylinder, scooping means therein, a drain pipe connected with said scoopingmeans, and a spider attached to the cylinder independently of its heads and supporting the said drain pipe, substantially as described.

22. In combination a drying cylinder having heads, one of said heads having a hollow trunnion, a drain pipe communicating with the hollow trunnion at one end and closed at its other end, a spider having its arms attached to the cylinder independently of its heads and supporting the closed end of'said pipe, and scooping means within the cylinder connected with said drain pipe.

23. In apparatus for removing water from the interior of steam heated cylinders of paper drying machines and the like, the comthe interior of steam heated cylinders of a paper drying machines and the like, the combination of a cylinder, a drain pipe in the cylinder, a series of scoops therein arranged longitudinally of the cylinder, each scoop having an open mouth and side flanges, and a rod extending across the mouths of the series of scoops to hold them closely against the wall of the cylinder.

25. In apparatus for removing water from the interior, of steam heated cylinders of paper drying machines and the like, the combination of a cylinder, a drain pipe therein, a series of scoops in and arranged longitudinally of the cylinder, pipes connecting the scoops with the drain pipe, a rod extending across the mouths of the series of scoops to hold them closely against the wall of the cylinder, and slotted studs attached to the cylinder between the scoops and engaging the rod, substantially as described.

26. In apparatus for removing Water from the interior of steam heated cylinders of paper drying machines and the like, the com-' bination of a cylinder, a drain pipe therein, a series of scoops in and arranged longitudinally of the cylinder; pipes connecting the scoops with the drain pipe, a rod extending across the mouths of the series of scoops to hold them closely against the Wall of the cylinder, and slotted studs attached to the cylinder between the scoops and engaging the rod, substantially as described.

27. In apparatus for removing water from the interior of steam heated cylinders of paper drying machines and the like, the combination of a cylinder, a drain pipe therein the interior of steam heated cylinders of paper drying machines and the like, the combination of a cylinder, a drain pipe therein, a series of scoops in the cylinder arranged longitudinally thereof each having an open mouth and side flanges, a rod extending across the mouths of the series of scoops to .hold them closely against the wall of the cylinder; pipes connecting the scoops with the drain pipe, slotted studs attached to the cylinder between the scoops and engaging the rod and a spider attached to the cylinder independently of the heads and supporting the said drain pipe.

In testimony that I claim the foregoing as my own, I a fiix my signature in presence of two witnesses.

OTIS WILLIAM DODGE. Witnesses:

ARTHUR E. DoWELL, JAMES R. MANSFIELD. 

